Nordic Pure 20x20x4M12+C-1 MERV 12 Plus Carbon AC Furnace Air Filters, Qty-1 Actual Size of Carbon Air Filter: 19 1/2 x 19 1/2 x 3 5/8 Odor absorbing activated carbon One convenient air filter - MERV 12 pleated plus activated carbon A simple solution for controlling both odors and dust particles Nordic Pure Manufacturer Direct Since 1960 - Made in the USA